CVE-2026-16873

Received Received - Intake

Local Privilege Escalation in IBM AIX and PowerVM VIOS

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: IBM Corporation

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to achieve local privilege escalation due to an out-of-bounds write.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-16873

EUVD

EUVD-2026-62875

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	aix	From 7.2 (inc)
ibm	aix	From 7.3 (inc)
ibm	powervm_vios	From 4.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is a local privilege escalation vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a local attacker to execute an out-of-bounds write, potentially gaining higher privileges on the system.

Impact Analysis

If exploited, this vulnerability could let an attacker with local access escalate their privileges, potentially gaining full control over the affected system. This could lead to unauthorized data access, system manipulation, or further network compromise.

Mitigation Strategies

Apply IBM AIX and PowerVM VIOS security patches or updates as soon as they become available to address the out-of-bounds write issue.

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